Cermet II

 Hygrometer
The Cermet II is the intelligent choice for reliable on-line measurement of moisture in virtually any gas, across many applications. The Cermet II combines Michell's Advanced Ceramic Moisture Sensor and a monitor unit that can be located up to 1200m apart. While the Cermet II is simple to use, it has the flexibility to be applied to almost any humidity measurement application. The instrument can display measurement units in °C or °F dew point, ppmV, lb/MMscf or g/m³ across the measurement range -100 to +20°Cdp at pressures up to
400 barg. The Cermet II also can accept a pressure signal from a pressure transmitter (optional) providing the means of active pressure compensation for concentration units of measurement.



Product Features

  • Wide measurement range, calibrated -100 to +20°Cdp
  • ±1.0°C accuracy
  • Analogue and digital output
  • Pressure sensor input
  • Up to 4 alarm relays
  • User selectable measurement units
  • Clear and easy to read display
Cermet II

Technical Specification

Sensor
Measurement Range -100 to +20°Cdp (-148 to +68°Fdp)
Accuracy (dew point) ±1°C from -60 to +20°Cdp
(±1.8°F, -76 to +68°Fdp)
±2°C from -100 to -60°Cdp
(±3.6°F, -148 to -76°Fdp)
Enclosure Stainless steel
Ingress Protection IP66 in accordance with standard BS EN 60529:1992 and NEMA 4 in protection and accordance with standard NEMA 250-2003
Operating Temperature -40 to +60°C (-40 to +140°F)
compensated over -20 to +40°C (-4 to +104°F)
Storage Temperature -40 to +109°C (-40 to +165°F)
Operating Pressure From vacuum to 40 MPa (400 barg/5801 psig) (max)
Flow Rate 1 to 5 l/min (2.1 to 10.5 scfh)
Gas Velocity 0 to 10m/sec (0 to 32.8 ft/sec)
Process Connection 5/8" UNF parallel thread
Sensor Calibration Traceable to UKAS and NIST
Analyzer
Measurement Units °C, °F dew point; ppmV with user selectable range and resolution; lb/MMSCF range dependent on pressure (natural gas); g/m³ (natural gas). Digital processing and linearization with active or passive pressure compensation
Resolution 0.1 °C from -80 to +20°Cdp
(0.18°F, -112 to +68°Fdp)
1°C from -100 to -80°Cdp
(1.8°F, -148 to -112°Fdp)
Secondary Measurement Variable Pressure using an optional external transducer over a range of 0-45 MPa (450 barg/6527 psig. Completely user-configurable for any industry standard transducer with an 4-20 mA output. Automatic compensation for ppmV, lbs/MMscf and g/m³ units.
Alarm Relays Two user adjustable isolated 10A form 'C' rated at 240 V AC or 24 V DC
Outputs:
   Analog:4-20 mA as standard (max load 500 Ω) user configurable and scalable
   Digital: RS232
Power Supply Universal 85 to 265 V AC, 50/60 Hz or 95 to 370 V DC
Operating conditions
Operating Temperature
   Analyzer:0 to +50°C (32 to +122°F)
   Sensor: -20 to +50°C (-5 to +122°F)
Ingress Protection
   Analyzer:IP54 (NEMA 12) standard (front panel only) IP66 (NEMA4) with optional cover (front panel only)
   Sensor: IP66 (NEMA4)
Options
Outputs:
   Analog:0-20 mA optional (max load 500 Ω) 0-10 V optional (min load 5 K Ω) both user configurable and scalable
   Digital: RS485: provides 2-way communication - full data access to user and total instrument configuration
Alarm Relays 1 or 2 additional 5 A relays (max 4 total) n/o type fully user configurable and adjustable over the full range, full choice of units and sensor fault alarm functions
Power Supply 18 to 36 V AC; 9 to 60 V DC
Cable Standard 2m (6.56ft) (1200m/3937ft max)

Applications

Compressed Gas Breathing Air Natural Gas & Petrochemicals Power Generation Research & Development

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